We're going to solve 1440 multiplied by 4007
1440 × 4007 = 4007 × (1440)
+ 4007 × 0 what gives us 0
+ 4007 × 40 that is equal 160280
+ 4007 × 400 resulting in 1602800
+ 4007 × 1000 which equals 4007000

= 5770080
